Investigation on Heat Transfer Performance and Mechanism of New Condensation Enhanced Tubes with Machined Surface

Jian Sheng Wang; Yan Zhe Li

doi:10.4028/www.scientific.net/AMR.668.603

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 668Investigation on Heat Transfer Performance and...

Investigation on Heat Transfer Performance and Mechanism of New Condensation Enhanced Tubes with Machined Surface

Abstract:

At present, researchers pay close attention to heat transfer enhancement, and many new surface structures are developed. Two kinds of new condensation enhanced tubes with machined surface, namely NO.1 and NO.2, are put forward. The experimental results show that the enhanced tubes can improve condensation heat transfer evidently, which is due to the special internal and external surface structures. With water vapor as condensation medium, the enhancement ratios of total heat transfer coefficient (k) are 1.6-2.4 and 1.47-1.8 comparing with smooth tube, respectively, and the ratios of outside condensation heat transfer coefficient (ho) are 5.67-6.67 and 3-4 correspondingly. With alcohol vapor as condensation medium, the average enhancement ratios of k are 3 and 2 times as great as that of smooth tube, and the ratios of ho are 3-4.25 and 2.25-3.5 correspondingly.

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Periodical:

Advanced Materials Research (Volume 668)

Pages:

603-607

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.668.603

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Online since:

March 2013

Authors:

Jian Sheng Wang, Yan Zhe Li

Keywords:

Condensation, Different Media, Enhanced Heat Transfer

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